<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>4.列表排序</title>
    <!--  引入Vue  -->
    <script type="text/javascript" src="../js/vue.js"></script>
</head>
<body>
    <!--  准备好一个容器  -->
    <div id="root">
        <h2>人员列表</h2>
        <input type="text" placeholder="请输入名字" v-model="keyWord">
        <button @click="sortType = 2">年龄升序</button>
        <button @click="sortType = 1">年龄降序</button>
        <button @click="sortType = 0">原顺序</button>
        <ul>
            <li v-for="p in filPersons" :key="p.id">
                {{p.name}}-{{p.age}}--{{p.sex}}
                <input type="text">
            </li>
        </ul>
    </div>
</body>

<script type="text/javascript">

    //用computed实现
    new Vue({
        el: '#root',
        data: {
            keyWord: '',
            sortType:0, //0原顺序.1降序,2升序
            persons: [
                {id: '001', name: '马冬梅', age: 18, sex: '女'},
                {id: '002', name: '周冬雨', age: 17, sex: '女'},
                {id: '003', name: '周杰伦', age: 30, sex: '男'},
                {id: '004', name: '温兆伦', age:30, sex: '男'}
            ]
        },
        computed: {
            filPersons() {
                const  arr = this.persons.filter((p) => {
                    return p.name.indexOf(this.keyWord) !== -1
                })

                if(this.sortType){
                    arr.sort((p1,p2)=>{
                        return this.sortType === 1 ? p2.age-p1.age : p1.age-p2.age
                    })
                }
                return arr
            }
        }
    })
</script>
</html>